Bearing



Feb. 10, 1953 W, F. PITTMAN 2,628,136

BEARING Filed Sept. l2, '1947 3 Sheets-Sheet l Inventar A Ito meys Feb. 10, 1953 WQ F P|TTMAN 2,628,136

BEARING Filed Sept. l2, 1947 5 Sheets-Sheet 2 wauw Pmmn A t/o rneys Feb. 10, 1953 w. F. ITTMAN BEARING 5 Sheets-Sheet 3 Filed Sept. l2, 194'? Wavre? Fl Fman Patented Feb. 10, 1953 UNITED STATES PATENT OFFICE BEARING Walter F. Pittman, Kenly, N. C.

Application September 12, 1947, Serial No. 773,698

1 Claim. l

The present invention relates to bearings and it consists in the combinations, constructions and arrangements of parts herein described and claimed.

It is an object of the invention to provide a novel bearing for interconnecting a connecting rod with a crank pin bearing.

Another object of the invention is the provision of a multi-part pitman of novel construction.

Another object of the invention is the provision of a novel oiling system for a bearing.

A further object of the invention is the provision of a novel means of adjustment for a multipart pitman with respect to a crankpin associated therewith.

Another object of the invention is the provision of a novel means for adjustment for wear upon the ends of a bearing.

A still further object of the invention is the provision of a novel cushioning band adapted to be interposed between the connecting rod and the pitman.

A further object of the invention is the provision of a device of the character set forth which may be easily assembled and disassembled.

Other and further objects of the invention will become apparent from a reading of the following specification taken in conjunction with the drawings, in which:

Figure 1 is a fragmentary elevational view, partly broken away, of an embodiment of the invention, providing means to detach or interconnect the piston rod from a crank pin bearing.

Figure 2 is a view similar to Figure l but broken away still further to disclose certain details of the invention,

Figure 3 is a plan View of an element of the invention,

Figure 4 is a view similar to Figure 1 but showing a modied form the invention may assume,

Figure 5 is a sectional view showing certain details of the invention,

Figure 6 is an elevational view of a detachable crankshaft journal bearing forming a part of the invention,

Figure '7 is a view similar to Figure 6 showing a modified form of crank shaft journal bearing,

Figure 8 is a sectional View taken along line -S of Figure 7,

Figure 9 is an elevational view of an element of the invention,

Figures 10 and l1 are perspective views of certain elements of the invention, and

Figure 12 is a fragmentary plan View, partly broken away, oi a journal bearing for a crank- 2 shaft constructed in accordance with the invention.

Generally, there is provided bearing constructions comprising improvements over Patent No. 2,399,889 on May '7, 1946, granted to the present inventor and provision is made for a segmented pitman for interconnectinga connecting rod and a crankpin wherein one of the segments is adapted to overlap it contiguous segments and thus provide adjustability while at the same time providing a snugly fitting entirety. Provision is also made for a journal bearing of novel construction including thrust washers having novel oil ducts therein.

Referring now more particularly to the drawings, there is shown therein a connecting rod IIJ having a pair of integrally formed dependent ears I! and I2 between which is adapted to be fitted an inverted U-shaped cushioning member I3 whose arms I4 and I5 are provided with laterally extending openings i6 and il, respectively. Like openings (not shown) are provided in the ears II and I2. A sleeve band i8 of generally cylindrical shape is adapted to be positioned in the openings in the ears II and i2, in the openings I and I7 and an opening (not shown) in a lug I9 formed integrally with an upper segment 2li. Through the hollow central portion 22 of the sleeve I8, a bolt 23 is adapted to pass. A nut 24 is threadably mounted upon the threaded end of the bolt 23 and is provided with a transversely extending cotter pin 25.

The upper segment 26 is provided with an integrally formed outwardly extending lug 26 at either end and is provided at either end of its inner side with -cut away portions 21 and 28. The

lugs 26 have transversely extending openings 29 formed therein.

A pair of side segments 39 and 3I is provided with lugs 32 and 33, respectively, adjacent their upper ends and each of the segments is provided with an extended portion 34 and 35, respectively, which are adapted to underlie the inner ends of the upper segment 2i! in the cut away portions 2'I and 28, respectively, and bolts 35 and 3i are adapted to hold the lugs 2E and 32 and 26 and -33 together with shims 33 and 39 interposed between said pairs of lugs. The bolts 35 and 3l are provided with sleeves 4B and 4I, respectively, of the same construction as the sleeve I8 above described and the bolts 3S and 3? are provided with cotter pins 42 and 63, respectively.

The side segments 3!! and 3| are provided with integrally formed lugs All and A5, respectively, at their lower ends, which are adapted to engage lugs 46 and 41, respectively, formed integrally at the outer ends of a lower segment 43 by means of bolts 49 and 58, respectively, having sleeves 5| and 52, respectively, cotter pins 53 and 54, respectively, and shims 55 and 56, respectively.

The segment 48 is provided with an integrally formed oil scoop 51 having a bore 58 formed therein. Inner segments 59, 59, 6| and E52 are arranged within the outer segments 29, 3|, 48 and 38, respectively and are adapted to encompass a crank pin 93 and cushioning segments 64, 65, 66 and 61 are respectively interposed between the aforesaid aligned outer and inner segments.

Each of the inner segments is provided with an outwardly extending lug detent 68 adapted to protrude through its adjacent cushioning segment into a suitable opening in the inner face of the outer segment, as best shown in Figure l. i.

Indented areas G8 are provided in the outer faces of the cushioning segments B, 55, G6 and 61 and an opening 18 in the segment 2@ communicates with the area 69 in the uppermost cushioning element 54.

The segments 29 and 59 and the associated cushioning element 5d are provided with aligned openings 1I. The inner face of the segment 48 is provided with apair of outwardly extending grooves 'I2 which communicate with the bore 58 and the inner segment 5I is provided with an opening '.3 therethrough.

In operation, it will be apparent that the various segments may be quickly and easily assembled about the crank pin 83, the bolts 3S, 31, 139 and 50 and their attendant parts placed in the proper lugs and tightened and that whenever adjustment is necessary, the same may be effected by the loosening of certain of the bolts and taking up the slack thus created by further tightening the remaining bolts. The provision of the cushioning member I3 between the ears and I2 of the connecting rod I8 and the lug I9 makes for an absence of noise and shock at this point in the operation of the device, as well as providing means for adjustment when wear has caused a loosening of this particular connection.

The oil scoop will cause oil to be taken in through the bore 58 and the same will be forced throughout the pitman, escaping through the openings 1S and 1|. A certain amount of the oil entering through the bore 58 will circulate 'between the outer segments and the cushioning members 64, 95, G8 and 61, thus acting as an oil cushion and giving greater efficiency alongl with less wear to the pitman.

Again, it will be apparent that the detents G8 will act to keep the inner segments, the cushioning members and the outer segments in proper alignment and that the overlapping of the upper segment 29 of the portions 34 and 35 of the side segments 39 and 3|, respectively, will facilitate the relative adjustment of the upper segment 29 with respect to the side segments 39 and 3|.

In the ferm of the invention shown in Figure 4, wherein identical parts are given identical reference characters, the lug I9 is formed integrally with an upper segment 14 which is substantially semi-circular and is provided with a pair of horizontally extending lugs 15. A lower segment 16 is 0f substantially semi-circular shape and is provided with horizontally extending lugs 11 adapted to be fastened to the lugs by means of bolts 18 having the same general construction as those heretofore described. Shims 19 are interposed between the lugs 15 and 18.

Inner segments 89 and 8| are arranged about the crank pin 53 adjacent the segments 1li and 19, respectively, and cushioning elements 82 and 83 are interposed between the segments 111 and 89 and 19 and 3 I, respectively.

The functioning of the pitman shown in Figure 4 is the same as that above described with relation to the device shown best in Figures 1 to 3, inclusive and it is to be understood that the Various elements are similarly constructed although not shown in detail.

In Figure 6 there is shown a journal bearing for a crankshaft 84 wherein a pair of brackets 85 and 86 are formed integrally with side segments 81 and 88, respectively, which are interconnected by -ineans of an upper segment 89 and a lower segment 89. The segments S1 and 88, respectively, yare provided with pairs of lugs 9i and 92', respectively, which lugs are adapted to be fastened to ,pairs of lugs 93 and 94 carried by the segments 8G and si), respectively, by means of bolts 95 of similar construction and having similar attendant parts to those heretofore described.

'Ihe brackets S5 and 83 are adapted to be fastened to the engine by means of bolts 95 and 91 or the like, forming the detachability.

Thrust members 98 having diametrically opposed outwardly extending lugs 99 adapted to t within recesses |89 in the side segments 81 and 88 are provided at either side of the bearing. The thrust members 98 are provided with a series of radially extending oil grooves Il which are interconnected by means of curvular grooves |82. Shims H33 are interposed between the adjacent lugs carried by the segments 81, 88, 89 and 90.

The operation of this fonm of the invention is as above described with respect to Figures 1 and 2, the whole being adjustable by means of the bolts 95 as aforesaid with respect to the bolts 3G, 31, 139 and 5d and the thrust members 98 being positioned at either side of the journal bearing will allow for a lessened amount of friction and at the same time be adjustable laterally with respect to the crankshaft 8d as will be later described with respect to Figure 12.

In Figure 7, there is shown a journal bearing for the crankshaft 34 wherein there is provided an upper segment |84 having a pair of horizon tally extending lugs |05 and a lower segment |86 having a pair of horizontally extending brackets |81 formed integrally therewith and having the lugs |05 fastened thereto by means of bolts |98 similar to those heretofore described.

At |69 in Figure 6 and at I 9 in Figure 7, there is provided Ia conventional force feed oil connection for the bearing structure shown therein. Shims III are interposed between the lugs |55 and the brackets |01.

The operation of the device shown in Figure '7 is identical with tha-t shown in Figure 6 and it is to be understood that the various elements f contained therein are similar to those described above with respect to Figures l and 2.

Referring now to Figure l2 of 'the drawings, wherein the journal bearing disclosed in Figure '1 is shown mounted upon the drive shaft 30, it will be seen that there is provided. a reduced portion I I2 of the shaft 86 upon which is mounted a timing gear I I3 having teeth IM and which is keyed to the shaft by means of keys I I5.

The outer end of the shaft is threaded, as indicated at IG and has threadably mounted thereon a lock nut H1 which is provided with a transversely extending cotter pin H8 which is also adapted to protrude through an opening H9 in the reduced portion H2 of the shaft 84. The timing gear H3 is provided with an annular inwardly extending projection |20 which is adapted to envelope the outer end |23 of the normal portion of the shaft 84. A collar |2| is formed integrally with the lock nut H1 and bears against the timing gear H3. The operation o f vthis form of the invention is as above described.

Thrust members or washers |30 are provided on either side of the journal bearing and are similar in construction to the thrust members 98 except that they are Without the outwardly extending lugs 99.

It will be apparent that the bearings shown herein may be quickly and easily attached to and detached from a shaft. It will also be apparent that lateral wear may be compensated for by replacing the thrust members |30.

While but certain forms of the invention have been shown and described herein, it will be readily apparent to those skilled in the art that many minor modifications may be made hereinrwithout departing from the spirit of the invention or the scope of the appended claim.

What is claimed is:

A journal bearing for a crank shaft comprising, in combination, a crank shaft, a cylindrical thrust member surrounding said crank shaft and having 8 integrally formed therewith a pair of diametrically opposed outwardly extending dogs, a pair of horizontally extending brackets mounted at either side of said crank shaft, a side segment integrally formed at the inner end of each of said brackets and each bearing against said thrust member, each of said side segments having a centrally disposed recess formed in its inner face for receiving therein one of said dogs, an upper segment bearing against said thrust member, a lower segment bearing against said thrust member, an outstanding lug'formed at each end of each of said segments, and bolts adjustably connecting adjacent pairs of said lugs.

WALTER F. PITTMAN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,254,345 Nowosielski Jan. 22, 1918 1,434,904 Mansfield Nov. 7, 1922 1,741,621 Godfrey Oct. 8, 1927 1,764,672 Austin June 17, 1930 ,1,790,253 Taylor Jan. 27, 1931 1,822,807 Goodson Sept. 8, 1931 2,079,357 Morris May 4, 1937 2,335,638 Bogner Nov. 30, 1943 2,399,889 Pittman May 7, 1946 

